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Symphurus williamsi Jordan and Culver, 1895
WILLIAMS TONGUEFISH
Life   Vertebrata   Fish   Cynoglossidae   Symphurus

Symphurus williamsi
www.fao.org Copyright Michel Lamboeuf · 0
Symphurus williamsi
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Overview
Main identification features
  • pale brown; thin faint complete bars
  • dorsal, anal and tail fins : ~uniform
  • inside opercle dark
  • blind side dorsal and anal finsrays: 1-3 scales on base
Yellow tonguefish, William's tonguefish

Body elongate, pointed at tail end, highly compressed; eyes small, close together, on left side, with small covers over pupils; snout rounded; mouth small, arched (strongly on blind side), at front or a little under snout; preopercle covered with skin; dorsal origin ~above upper eye, 89-95 dorsal rays; 73-79 anal rays; 12 tail rays; no pectoral; only left pelvic present, separate from anal; dorsal and anal fused to tail; scales rough, on both sides; no lateral line; 86-96 scales along body; rays of dorsal and anal on blind side with 1-3 rough scales.

Top side yellow to pale or dark brown; sometimes narrow, irregular, diffuse crossbars; dorsal, anal and tail fin uniform; inside operculum dark; lining of gut cavity not dark.

Size: 12 cm.

Habitat: sandy bottoms, including tidepools, estuaries and bays.

Depth: 1-55 m.

Southern Baja to the Gulf of California to Peru.


Attributes
Abundance: Common.
Cites: Not listed.
Climate Zone: North Temperate (Californian Province &/or Northern Gulf of California); Northern Subtropical (Cortez Province + Sinaloan Gap); Northern Tropical (Mexican Province to Nicaragua + Revillagigedos); Equatorial (Costa Rica to Ecuador + Galapagos, Clipperton, Cocos, Malpelo); South Temperate (Peruvian Province ).
Depth Range Max: 55 m.
Depth Range Min: 1 m.
Diet: mobile benthic worms; mobile benthic crustacea (shrimps/crabs); mobile benthic gastropods/bivalves.
Eastern Pacific Range: Northern limit=31; Southern limit=-14; Western limit=-115; Eastern limit=-75; Latitudinal range=45; Longitudinal range=40.
Egg Type: Pelagic; Pelagic larva.
Feeding Group: Carnivore.
FishBase Habitat: Demersal.
Global Endemism: Tropical Eastern Pacific (TEP) endemic; East Pacific endemic; All species.
Habitat: Estuary; Mud; Soft bottom (mud, sand,gravel, beach, estuary & mangrove); Soft bottom only; Sand & gravel.
Inshore Offshore: Inshore; Inshore Only.
IUCN Red List: Not evaluated / Listed.
Length Max: 12 cm.
Regional Endemism: Continent only; Continent; TEP endemic; Continental TEP endemic; 3 provinces (Cortez + Mexican + Panamic) endemic; All species.
Residency: Resident.
Salinity: Brackish; Marine.
Water Column Position: Bottom; Bottom only;


Names
Scientific source:

Links to other sites

References
  • Béarez, P., 1996., Lista de los Peces Marinos del Ecuador Continental., Revista de Biologia Tropical, 44:731-741.
  • Castri-Aguirre, J.L., Espinoza-Pérez, H. and Schmitter-Soto, J.J., 2002., Lista sitemática, biogeográfica y ecológica de la ictiofauna estuarino lagunar y vicaria de México. En: Lozano-Vilano, M. L. (Ed.). Libro Jubilar en Honor al Dr. Salvador Contreras Balderas., Universidad Autonoma de Nuevo León:117-142.
  • Castro-Aguirre, J.L., 1999., Ictiofauna estuarino-lagunar y vicaria de México., Editorial Limusa S.A. de C.V.: 1-629pp.
  • Findley, L.T., Hendrickx, M.E., Brusca, R.C., van der Heiden, A.M., Hastings, P.A., Torre, J., 2003., Diversidad de la Macrofauna Marina del Golfo de California, Mexico., CD-ROM versión 1.0. Projecto de la Macrofauna del Golfo .  Derechos reservados de los autores y Conservación Internacional.
  • Fischer , W. , Krup , F. , Schneider , W. , Sommer , C. , Carpenter , K. E. and Niem, V. H., 1995., Guia FAO para la Identificacion de Especies de para los fines de la Pesca. Pacifico Centro-Oriental. Volumen II. Vertebrados - Parte 1., FAO2:647-1200.
  • González Navarro , E. and Saldierna Martínez, R., 1997., Zooplancton de la Bahía de La Paz, B.C.S. (1990-1991). En Urbán Ramírez, J. y M. Ramírez Rodríguez (Eds.). La Bahía de La Paz investigación y conservación., Universidad Autónoma de Baja California Sur:43-58.
  • Hildebrand, S.F., 1946., A descriptive catalog of the shore fishes of Peru., Bull. U.S. Nat. Mus., 189:1-530.
  • Jimenez-Prado, P., Béarez, P., 2004., Peces marinos del Ecuador continental / Marine fishes of continental Ecuador., SIMBIOE/NAZCA/IFEA tomo 1 y 2.
  • Jordan , D.S. and Evermann, B.W., 1898., The fishes of North and Middle America: a descriptive catalogue of the species of fish-like vertebrates found in the waters of North America, north of the Isthmus of Panama. Part III., Bull. U.S. Nat. Mus., 47:2183-3136.
  • Jordan, D.S., 1895., The fishes of Sinaloa., Proceedings of the California Academy of Sciences (Series 2), 5:377-514.
  • Love, M.S., Mecklenburg, C.W., Mecklenburg, T.A., Thorsteinson, L.K., 2005., es of the West Coast and Alaska: a checklist of North Pacific and Artic Ocena species from Baja California to the Alaska-Yukon border., U.S. Department of the Interior, U.S. Geological Survey, Biological Resources Division, 288pp.
  • Osburn , R. C. and Nichols, J. T., 1916., Shore Fishes Collected by the 'Albatross' Expedition in Lower California with Descriptions of New Species., Bull. Amer. Mus. Nat. Hist., 35:139-181.
  • Van der Heiden , A. M. and Findley, L. T., 1988., Lista de los peces marinos del sur de Sinaloa, México., Anales del Centro de Ciencias del Mar y Limnologia de la Universidad Autonoma Nacional de Mexico, 15:209-224.

Acknowledgements

I thank Ashley MacDonald and John Pickering, University of Georgia, for technical support in building this page.


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